<div class="tree">
    <div class="nav">
        <ul class="layui-nav-tree layui-nav layui-nav-side" id="tree">
            <li class="layui-nav-item">
                <a href="javascript:;">内容管理</a>
                <dl class="layui-nav-child">
                    <dd class="{{ if channel == 'newslist'}}layui-this{{/if}}"><a href="/admin/newsList">新闻管理</a></dd>
                    <dd class="{{ if channel == 'addnews'}}layui-this{{/if}}"><a href="/admin/addNews">发布新闻</a></dd>
                </dl>
            </li>
        </ul>
    </div>
</div>